To celebrate his 60 years, WENN has compiled 10 fascinating facts about the star:

- Williams' Mork character originally appeared in hit show "Happy Days," before he was given his own spin-off series, "Mork & Mindy." The star won the role when producer Garry Marshall asked him to sit down and he responded by resting his head on the seat of a chair.

- He was voted 'least likely to succeed' by classmates during his school days.

- The actor has been married twice. His first marriage was to Valerie Velardi, and he met his second wife, Marsha, when she was nanny to his son, Zak.

- Williams is an avid computer games fan and his daughter Zelda was named after Princess Zelda from The Legend Of Zelda series.

- The comedian studied with late Superman star Christopher Reeve at the Juilliard School in New York and the pair was close friends until Reeve's death in 2004.

- He has been nominated for an Oscar four times but only won once - for Best Supporting Actor in 1997's Good Will Hunting.

- Williams is a keen cyclist, often training with Lance Armstrong, and owns more than 50 bicycles.

- He speaks fluent French.

- The funnyman co-owns a restaurant in San Francisco with Robert De Niro and Francis Ford Coppola.

- The star is an avid philanthropist - he set up the Windfall Foundation, which helps raise money for a variety of charities.